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Microwave photon radio frequency phase shifter based on spectral processing and phase shifting method thereof

A technology of microwave photons and phase shifters, applied in the field of spectral processing, can solve problems such as insufficient flexibility, phase noise, and difficulty in realizing full-angle scanning

Inactive Publication Date: 2019-08-16
INNER MONGOLIA UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the existing technical problems, the present invention provides a microwave photonic radio frequency phase shifter and its phase shifting method based on spectral processing, which solves the serious phase noise generated by the existing phase shifter, and it is difficult to realize full-angle scanning. The problem of lack of flexibility

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  • Microwave photon radio frequency phase shifter based on spectral processing and phase shifting method thereof
  • Microwave photon radio frequency phase shifter based on spectral processing and phase shifting method thereof
  • Microwave photon radio frequency phase shifter based on spectral processing and phase shifting method thereof

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Embodiment 1

[0053] see figure 1 , this embodiment provides a microwave photon radio frequency phase shifter based on spectral processing, the phase shifter includes a laser source, an optical modulator, a fiber amplifier, a spectral processing system, multiple photodetectors and multiple optical couplers.

[0054] The laser source is a multi-wavelength laser source (Laser), and is used to send out optical signals. In this embodiment, the laser source is a multi-wavelength external cavity laser with a line width of 100 kHz and a wavelength tuning of 1549.576 nm. Preferably, the external cavity laser is a Southern Photonics TLS150 laser. The noise of the laser source mainly comes from the spontaneous emission effect, which will result in a finite spectral width of the output laser, also known as the laser linewidth. The change of the carrier concentration in the semiconductor material leads to the change of the optical gain and the refractive index, and the coupling between the refractive...

Embodiment 2

[0080] see Figure 9 , this embodiment provides a microwave photonic radio frequency phase shifter based on spectrum processing, which adds a microwave amplifier and a vector network analyzer on the basis of Embodiment 1. The microwave amplifier is used to amplify the radio frequency signal, and the amplified signal is used as the driving signal of the optical modulator. Vector network analyzers are used to test the phase and amplitude of radio frequency signals, and can also measure the energy of radio frequency signals. Among them, the microwave amplifier is JSM-KFD76C amplifier, and the bias voltage is V π / 2, V π is the half-wave modulation voltage of the optical modulator. The vector network analyzer is Agilent 8720ES vector network analyzer.

[0081] In this embodiment, a phase shifting experiment is carried out. In the experiment, Waveshaper 4000s of Finisar Company is used to complete the spectrum processing function for experimental verification. Waveshaper4000s ...

Embodiment 3

[0090] This embodiment provides a microwave photon radio frequency phase shifting method based on spectral processing, which can be applied to the microwave photon radio frequency phase shifter based on spectral processing in embodiment 1 or embodiment 2, and is used to perform multi-wavelength optical signals Phase shift processing, which includes the following steps:

[0091] Step 1, performing voltage bias on the optical signal, and the maximum output point of the bias suppresses the optical double sideband modulation of the even order sideband, and obtains the optical modulation signal of the double sideband;

[0092] Step 2, amplifying the optical modulation signal through an optical fiber line to obtain an optical amplification signal;

[0093] Step 3. Separate the optical amplification signal into multiple reflected rays with different wavelengths, so that the reflected rays with different spectral components are projected on different pixels in each row in the laser pr...

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Abstract

The invention discloses a microwave photon radio frequency phase shifter based on spectrum processing and a phase shifting method thereof. The phase shifter comprises a laser source, an optical modulator, an optical fiber amplifier, a spectrum processing system, a photoelectric detector and an optical coupler. The optical amplification signal of the optical fiber amplifier is incident on the diffraction grating and is separated into a plurality of reflected light rays. Different spectral components in the plurality of reflected light rays are projected on different pixel points of each row, and the same spectral components are projected on different pixel points of each column. The laser processor modulates the amplitude and phase of the spectral component and forms a plurality of beat frequency light waves. Each optical coupler synthesizes an optical carrier wave and a first-order modulation sideband in a spectrum manner to generate an optical single sideband modulation signal. The optical single sideband modulation signal is subjected to beat frequency in a photoelectric detector to generate a radio frequency signal. The phase noise of the photon radio frequency phase shifter iseffectively restrained, the photon radio frequency phase shifting function is achieved, scanning at any angle can be achieved, flexibility is high, reconfiguration is achieved, and the phase shifter is suitable for large-scale phased array radar.

Description

technical field [0001] The present invention relates to a phase shifter in the technical field of spectrum processing, in particular to a microwave photon radio frequency phase shifter based on spectrum processing, and also to a microwave photon radio frequency phase shifter method based on spectrum processing of the microwave photon radio frequency phase shifter. Background technique [0002] The phase shifter is a device that can adjust the phase of the wave. It is a key device in beamforming phased array radars, satellite systems, and optical wireless systems. It is used in missile attitude control, accelerators, communications, instrumentation, and even in the field of music. The performance index of the phase shifter directly affects the anti-interference ability and sensitivity of these devices, as well as the weight, volume and cost of the system, so the research on the phase shifter is of great significance in the field of military and civilian satellite communicatio...

Claims

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Application Information

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IPC IPC(8): H04B10/516H04B10/548H04B10/2513
CPCH04B10/2513H04B10/516H04B10/5165H04B10/548
Inventor 魏永峰巩彩丽季玉双李昊乔宇胡学东
Owner INNER MONGOLIA UNIVERSITY
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